NoSQL - Motivation and Overview

Jonathan WeissPeritor GmbH

N✮SQLData-Storage jenseits von SQL

Wer?

Ruby-Entwickler

Open-Source-Contributor (http://github.com/jweiss)

@jweiss

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N✮SQL-Datenbanken?

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Built for the Web

Skalierbar

Performant

Flexibles Datenschema

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DynamoCouchDBDynomite

Tokyo Tyrant

MongoDB

Riak

Amazon SimpleDB

Redis Memcached

BigTableAmazon S3

Cassandra

Lotus Notes

Excel ;)Neo4j

Project Voldemort HBase

Der Status-Quo

Relationale Datenstrukturen

SQL

Transaktionssicherheit

Locking

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Das Problem

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Das Problem

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Die Lösung

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”Simplicity is prerequisite for reliability“— Edsger W. Dijkstra

Die Lösung

key => “value”

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Dokumente

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Integrität

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Eventual Consistency

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Append-Only

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Append-Only

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Update

Append-Only

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Update

Skalierbarkeit

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Tools

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Tools

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DynamoCouchDBDynomite

Tokyo Tyrant

MongoDB

Riak

Amazon SimpleDB

Redis Memcached

BigTableAmazon S3

Cassandra

Lotus Notes

Excel ;)Neo4j

Project Voldemort HBase

Tools

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DynamoCouchDBDynomite

Tokyo Tyrant

MongoDB

Riak

Amazon SimpleDB

Redis Memcached

BigTableAmazon S3

Cassandra

Lotus Notes

Excel ;)Neo4j

Project Voldemort HBase

Redis

Simpler Key-Value-Store

Speichert Strings, Listen und Sets

Persistenz über Snapshots oder Append-Logs

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Redis

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Redis

set foo 4

1000

+OK

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Request

Response

Scaling

Master-Slave mittels Snapshots

Multiple Master mittels Hash Ring

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Einsatz-Szenarien

Persistenter Cache

Session-Store

Realtime-Data: Monitoring, Trading, ...

Simple Message Queue

Shared State

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CouchDBrelax

CouchDB

Dokument-orientiert

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”CouchDB is built of the Web“— Jacob Kaplan-Moss

CouchDB Document

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{    "_id":  "BCCD12CBB",    "_rev":  "1-­‐AB764C",    "type":  "person",    "name":  "Darth  Vader",    "age":  63,    "headware":  ["Helmet",  "Sombrero"],    "dark_side":  true}

CouchDB Document

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{    "_id":  "BCCD12CBB",    "_rev":  "1-­‐AB764C",    "type":  "person",    "name":  "Darth  Vader",    "age":  63,    "headware":  ["Helmet",  "Sombrero"],    "dark_side":  true}

CouchDB Document

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{    "_id":  "BCCD12CBB",    "_rev":  "1-­‐AB764C",    "type":  "person",    "name":  "Darth  Vader",    "age":  63,    "headware":  ["Helmet",  "Sombrero"],    "dark_side":  true}

CouchDB - CRUD

Erstellen/Aktualisieren:

PUT /starwars/BCCD12CBB

Lesen:

GET /starwars/BCCD12CBB

Löschen:

DELETE /starwars/BCCD12CBB

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CouchDB

Wie komme ich an meine Daten?

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CouchDB

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Views!

CouchDB

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function(doc)  {    if  (doc.headware)  {        for  (var  hat  in  doc.headware)  {            emit(hat,  1);        }    }}

CouchDB

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function(keys,  values,  rereduce)  {    return  sum(values);}

Libraries

SimplyStored: Ruby wrapper

http://github.com/peritor/simply_stored

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ModelsAssociationsCallbacksValidationsDynamic finderS3 attachmentsParanoid delete

Libraries

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B-Tree

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Crash-Proof

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Offline by default

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Replication

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CouchDB

POST /_replication

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Und?

Daten sind wieder König

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Aber!

Kein goldener Hammer

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Peritor

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Cloud-Management und -Deployment made easy

http://scalarium.com

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